Nano Archive

Transparent conductive single-walled carbon nanotube networks with precisely tunable ratios of semiconducting and metallic nanotubes

Blackburn, Jeffrey L. and Barnes, Teresa M. and Beard, Matthew C. and Kim, Yong-Hyun and Tenent, Robert C. and McDonald, Timothy J. and To, Bobby and Coutts, Timothy J. and Heben, Michael J. (2008) Transparent conductive single-walled carbon nanotube networks with precisely tunable ratios of semiconducting and metallic nanotubes. ACS NANO, 2 (6). pp. 1266-1274.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nn800200d

Abstract

We present a comprehensive study of the optical and electrical properties of transparent conductive films made from precisely tuned ratios of metallic and semiconducting single-wall carbon nanotubes. The conductivity and transparency of the SWNT films are controlled by an interplay between localized and delocalized carriers, as determined by the SWNT electronic structure, tube-tube junctions, and intentional and unintentional redox dopants. The results suggest that the main resistance in the SWNT thin films is the resistance associated with tube-tube junctions. Redox dopants are found to increase the delocalized carrier density and transmission probability through intertube junctions more effectively for semiconductor-enriched films than for metal-enriched films. As a result, redox-doped semiconductor-enriched films are more conductive than either intrinsic or redox-doped metal-enriched films.

Item Type:Article
Uncontrolled Keywords:carbon nanotubes; conductivity; photovoltaic; doping; separation; thin films; optical properties; electrical properties
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nano objects
Physical Science > Nanoelectronics
ID Code:545
Deposited By:IoN
Deposited On:20 Jan 2009 11:19
Last Modified:29 Jan 2009 16:49

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